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Add type annotations and comments to auth handler (#7063)

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Patrick Cloke 2020-03-12 11:36:27 -04:00 committed by GitHub
parent bd5e555b0d
commit 77d0a4507b
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3 changed files with 106 additions and 89 deletions
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changelog.d/7063.misc Normal file
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@ -0,0 +1 @@
Add type annotations and comments to the auth handler.

193
synapse/handlers/auth.py
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@ -18,10 +18,10 @@ import logging
import time
import unicodedata
import urllib.parse
from typing import Any
from typing import Any, Dict, Iterable, List, Optional
import attr
import bcrypt
import bcrypt # type: ignore[import]
import pymacaroons
from twisted.internet import defer
@ -45,7 +45,7 @@ from synapse.http.site import SynapseRequest
from synapse.logging.context import defer_to_thread
from synapse.module_api import ModuleApi
from synapse.push.mailer import load_jinja2_templates
from synapse.types import UserID
from synapse.types import Requester, UserID
from synapse.util.caches.expiringcache import ExpiringCache
from ._base import BaseHandler
@ -63,11 +63,11 @@ class AuthHandler(BaseHandler):
"""
super(AuthHandler, self).__init__(hs)
self.checkers = {} # type: dict[str, UserInteractiveAuthChecker]
self.checkers = {} # type: Dict[str, UserInteractiveAuthChecker]
for auth_checker_class in INTERACTIVE_AUTH_CHECKERS:
inst = auth_checker_class(hs)
if inst.is_enabled():
self.checkers[inst.AUTH_TYPE] = inst
self.checkers[inst.AUTH_TYPE] = inst # type: ignore
self.bcrypt_rounds = hs.config.bcrypt_rounds
@ -124,7 +124,9 @@ class AuthHandler(BaseHandler):
self._whitelisted_sso_clients = tuple(hs.config.sso_client_whitelist)
@defer.inlineCallbacks
def validate_user_via_ui_auth(self, requester, request_body, clientip):
def validate_user_via_ui_auth(
self, requester: Requester, request_body: Dict[str, Any], clientip: str
):
"""
Checks that the user is who they claim to be, via a UI auth.
@ -133,11 +135,11 @@ class AuthHandler(BaseHandler):
that it isn't stolen by re-authenticating them.
Args:
requester (Requester): The user, as given by the access token
requester: The user, as given by the access token
request_body (dict): The body of the request sent by the client
request_body: The body of the request sent by the client
clientip (str): The IP address of the client.
clientip: The IP address of the client.
Returns:
defer.Deferred[dict]: the parameters for this request (which may
@ -208,7 +210,9 @@ class AuthHandler(BaseHandler):
return self.checkers.keys()
@defer.inlineCallbacks
def check_auth(self, flows, clientdict, clientip):
def check_auth(
self, flows: List[List[str]], clientdict: Dict[str, Any], clientip: str
):
"""
Takes a dictionary sent by the client in the login / registration
protocol and handles the User-Interactive Auth flow.
@ -223,14 +227,14 @@ class AuthHandler(BaseHandler):
decorator.
Args:
flows (list): A list of login flows. Each flow is an ordered list of
strings representing auth-types. At least one full
flow must be completed in order for auth to be successful.
flows: A list of login flows. Each flow is an ordered list of
strings representing auth-types. At least one full
flow must be completed in order for auth to be successful.
clientdict: The dictionary from the client root level, not the
'auth' key: this method prompts for auth if none is sent.
clientip (str): The IP address of the client.
clientip: The IP address of the client.
Returns:
defer.Deferred[dict, dict, str]: a deferred tuple of
@ -250,7 +254,7 @@ class AuthHandler(BaseHandler):
"""
authdict = None
sid = None
sid = None # type: Optional[str]
if clientdict and "auth" in clientdict:
authdict = clientdict["auth"]
del clientdict["auth"]
@ -283,9 +287,9 @@ class AuthHandler(BaseHandler):
creds = session["creds"]
# check auth type currently being presented
errordict = {}
errordict = {} # type: Dict[str, Any]
if "type" in authdict:
login_type = authdict["type"]
login_type = authdict["type"] # type: str
try:
result = yield self._check_auth_dict(authdict, clientip)
if result:
@ -326,7 +330,7 @@ class AuthHandler(BaseHandler):
raise InteractiveAuthIncompleteError(ret)
@defer.inlineCallbacks
def add_oob_auth(self, stagetype, authdict, clientip):
def add_oob_auth(self, stagetype: str, authdict: Dict[str, Any], clientip: str):
"""
Adds the result of out-of-band authentication into an existing auth
session. Currently used for adding the result of fallback auth.
@ -348,7 +352,7 @@ class AuthHandler(BaseHandler):
return True
return False
def get_session_id(self, clientdict):
def get_session_id(self, clientdict: Dict[str, Any]) -> Optional[str]:
"""
Gets the session ID for a client given the client dictionary
@ -356,7 +360,7 @@ class AuthHandler(BaseHandler):
clientdict: The dictionary sent by the client in the request
Returns:
str|None: The string session ID the client sent. If the client did
The string session ID the client sent. If the client did
not send a session ID, returns None.
"""
sid = None
@ -366,40 +370,42 @@ class AuthHandler(BaseHandler):
sid = authdict["session"]
return sid
def set_session_data(self, session_id, key, value):
def set_session_data(self, session_id: str, key: str, value: Any) -> None:
"""
Store a key-value pair into the sessions data associated with this
request. This data is stored server-side and cannot be modified by
the client.
Args:
session_id (string): The ID of this session as returned from check_auth
key (string): The key to store the data under
value (any): The data to store
session_id: The ID of this session as returned from check_auth
key: The key to store the data under
value: The data to store
"""
sess = self._get_session_info(session_id)
sess.setdefault("serverdict", {})[key] = value
self._save_session(sess)
def get_session_data(self, session_id, key, default=None):
def get_session_data(
self, session_id: str, key: str, default: Optional[Any] = None
) -> Any:
"""
Retrieve data stored with set_session_data
Args:
session_id (string): The ID of this session as returned from check_auth
key (string): The key to store the data under
default (any): Value to return if the key has not been set
session_id: The ID of this session as returned from check_auth
key: The key to store the data under
default: Value to return if the key has not been set
"""
sess = self._get_session_info(session_id)
return sess.setdefault("serverdict", {}).get(key, default)
@defer.inlineCallbacks
def _check_auth_dict(self, authdict, clientip):
def _check_auth_dict(self, authdict: Dict[str, Any], clientip: str):
"""Attempt to validate the auth dict provided by a client
Args:
authdict (object): auth dict provided by the client
clientip (str): IP address of the client
authdict: auth dict provided by the client
clientip: IP address of the client
Returns:
Deferred: result of the stage verification.
@ -425,10 +431,10 @@ class AuthHandler(BaseHandler):
(canonical_id, callback) = yield self.validate_login(user_id, authdict)
return canonical_id
def _get_params_recaptcha(self):
def _get_params_recaptcha(self) -> dict:
return {"public_key": self.hs.config.recaptcha_public_key}
def _get_params_terms(self):
def _get_params_terms(self) -> dict:
return {
"policies": {
"privacy_policy": {
@ -445,7 +451,9 @@ class AuthHandler(BaseHandler):
}
}
def _auth_dict_for_flows(self, flows, session):
def _auth_dict_for_flows(
self, flows: List[List[str]], session: Dict[str, Any]
) -> Dict[str, Any]:
public_flows = []
for f in flows:
public_flows.append(f)
@ -455,7 +463,7 @@ class AuthHandler(BaseHandler):
LoginType.TERMS: self._get_params_terms,
}
params = {}
params = {} # type: Dict[str, Any]
for f in public_flows:
for stage in f:
@ -468,7 +476,13 @@ class AuthHandler(BaseHandler):
"params": params,
}
def _get_session_info(self, session_id):
def _get_session_info(self, session_id: Optional[str]) -> dict:
"""
Gets or creates a session given a session ID.
The session can be used to track data across multiple requests, e.g. for
interactive authentication.
"""
if session_id not in self.sessions:
session_id = None
@ -481,7 +495,9 @@ class AuthHandler(BaseHandler):
return self.sessions[session_id]
@defer.inlineCallbacks
def get_access_token_for_user_id(self, user_id, device_id, valid_until_ms):
def get_access_token_for_user_id(
self, user_id: str, device_id: Optional[str], valid_until_ms: Optional[int]
):
"""
Creates a new access token for the user with the given user ID.
@ -491,11 +507,11 @@ class AuthHandler(BaseHandler):
The device will be recorded in the table if it is not there already.
Args:
user_id (str): canonical User ID
device_id (str|None): the device ID to associate with the tokens.
user_id: canonical User ID
device_id: the device ID to associate with the tokens.
None to leave the tokens unassociated with a device (deprecated:
we should always have a device ID)
valid_until_ms (int|None): when the token is valid until. None for
valid_until_ms: when the token is valid until. None for
no expiry.
Returns:
The access token for the user's session.
@ -530,13 +546,13 @@ class AuthHandler(BaseHandler):
return access_token
@defer.inlineCallbacks
def check_user_exists(self, user_id):
def check_user_exists(self, user_id: str):
"""
Checks to see if a user with the given id exists. Will check case
insensitively, but return None if there are multiple inexact matches.
Args:
(unicode|bytes) user_id: complete @user:id
user_id: complete @user:id
Returns:
defer.Deferred: (unicode) canonical_user_id, or None if zero or
@ -551,7 +567,7 @@ class AuthHandler(BaseHandler):
return None
@defer.inlineCallbacks
def _find_user_id_and_pwd_hash(self, user_id):
def _find_user_id_and_pwd_hash(self, user_id: str):
"""Checks to see if a user with the given id exists. Will check case
insensitively, but will return None if there are multiple inexact
matches.
@ -581,7 +597,7 @@ class AuthHandler(BaseHandler):
)
return result
def get_supported_login_types(self):
def get_supported_login_types(self) -> Iterable[str]:
"""Get a the login types supported for the /login API
By default this is just 'm.login.password' (unless password_enabled is
@ -589,20 +605,20 @@ class AuthHandler(BaseHandler):
other login types.
Returns:
Iterable[str]: login types
login types
"""
return self._supported_login_types
@defer.inlineCallbacks
def validate_login(self, username, login_submission):
def validate_login(self, username: str, login_submission: Dict[str, Any]):
"""Authenticates the user for the /login API
Also used by the user-interactive auth flow to validate
m.login.password auth types.
Args:
username (str): username supplied by the user
login_submission (dict): the whole of the login submission
username: username supplied by the user
login_submission: the whole of the login submission
(including 'type' and other relevant fields)
Returns:
Deferred[str, func]: canonical user id, and optional callback
@ -690,13 +706,13 @@ class AuthHandler(BaseHandler):
raise LoginError(403, "Invalid password", errcode=Codes.FORBIDDEN)
@defer.inlineCallbacks
def check_password_provider_3pid(self, medium, address, password):
def check_password_provider_3pid(self, medium: str, address: str, password: str):
"""Check if a password provider is able to validate a thirdparty login
Args:
medium (str): The medium of the 3pid (ex. email).
address (str): The address of the 3pid (ex. jdoe@example.com).
password (str): The password of the user.
medium: The medium of the 3pid (ex. email).
address: The address of the 3pid (ex. jdoe@example.com).
password: The password of the user.
Returns:
Deferred[(str|None, func|None)]: A tuple of `(user_id,
@ -724,15 +740,15 @@ class AuthHandler(BaseHandler):
return None, None
@defer.inlineCallbacks
def _check_local_password(self, user_id, password):
def _check_local_password(self, user_id: str, password: str):
"""Authenticate a user against the local password database.
user_id is checked case insensitively, but will return None if there are
multiple inexact matches.
Args:
user_id (unicode): complete @user:id
password (unicode): the provided password
user_id: complete @user:id
password: the provided password
Returns:
Deferred[unicode] the canonical_user_id, or Deferred[None] if
unknown user/bad password
@ -755,7 +771,7 @@ class AuthHandler(BaseHandler):
return user_id
@defer.inlineCallbacks
def validate_short_term_login_token_and_get_user_id(self, login_token):
def validate_short_term_login_token_and_get_user_id(self, login_token: str):
auth_api = self.hs.get_auth()
user_id = None
try:
@ -769,11 +785,11 @@ class AuthHandler(BaseHandler):
return user_id
@defer.inlineCallbacks
def delete_access_token(self, access_token):
def delete_access_token(self, access_token: str):
"""Invalidate a single access token
Args:
access_token (str): access token to be deleted
access_token: access token to be deleted
Returns:
Deferred
@ -798,15 +814,17 @@ class AuthHandler(BaseHandler):
@defer.inlineCallbacks
def delete_access_tokens_for_user(
self, user_id, except_token_id=None, device_id=None
self,
user_id: str,
except_token_id: Optional[str] = None,
device_id: Optional[str] = None,
):
"""Invalidate access tokens belonging to a user
Args:
user_id (str): ID of user the tokens belong to
except_token_id (str|None): access_token ID which should *not* be
deleted
device_id (str|None): ID of device the tokens are associated with.
user_id: ID of user the tokens belong to
except_token_id: access_token ID which should *not* be deleted
device_id: ID of device the tokens are associated with.
If None, tokens associated with any device (or no device) will
be deleted
Returns:
@ -830,7 +848,7 @@ class AuthHandler(BaseHandler):
)
@defer.inlineCallbacks
def add_threepid(self, user_id, medium, address, validated_at):
def add_threepid(self, user_id: str, medium: str, address: str, validated_at: int):
# check if medium has a valid value
if medium not in ["email", "msisdn"]:
raise SynapseError(
@ -856,19 +874,20 @@ class AuthHandler(BaseHandler):
)
@defer.inlineCallbacks
def delete_threepid(self, user_id, medium, address, id_server=None):
def delete_threepid(
self, user_id: str, medium: str, address: str, id_server: Optional[str] = None
):
"""Attempts to unbind the 3pid on the identity servers and deletes it
from the local database.
Args:
user_id (str)
medium (str)
address (str)
id_server (str|None): Use the given identity server when unbinding
user_id: ID of user to remove the 3pid from.
medium: The medium of the 3pid being removed: "email" or "msisdn".
address: The 3pid address to remove.
id_server: Use the given identity server when unbinding
any threepids. If None then will attempt to unbind using the
identity server specified when binding (if known).
Returns:
Deferred[bool]: Returns True if successfully unbound the 3pid on
the identity server, False if identity server doesn't support the
@ -887,17 +906,18 @@ class AuthHandler(BaseHandler):
yield self.store.user_delete_threepid(user_id, medium, address)
return result
def _save_session(self, session):
def _save_session(self, session: Dict[str, Any]) -> None:
"""Update the last used time on the session to now and add it back to the session store."""
# TODO: Persistent storage
logger.debug("Saving session %s", session)
session["last_used"] = self.hs.get_clock().time_msec()
self.sessions[session["id"]] = session
def hash(self, password):
def hash(self, password: str):
"""Computes a secure hash of password.
Args:
password (unicode): Password to hash.
password: Password to hash.
Returns:
Deferred(unicode): Hashed password.
@ -914,12 +934,12 @@ class AuthHandler(BaseHandler):
return defer_to_thread(self.hs.get_reactor(), _do_hash)
def validate_hash(self, password, stored_hash):
def validate_hash(self, password: str, stored_hash: bytes):
"""Validates that self.hash(password) == stored_hash.
Args:
password (unicode): Password to hash.
stored_hash (bytes): Expected hash value.
password: Password to hash.
stored_hash: Expected hash value.
Returns:
Deferred(bool): Whether self.hash(password) == stored_hash.
@ -1007,7 +1027,9 @@ class MacaroonGenerator(object):
hs = attr.ib()
def generate_access_token(self, user_id, extra_caveats=None):
def generate_access_token(
self, user_id: str, extra_caveats: Optional[List[str]] = None
) -> str:
extra_caveats = extra_caveats or []
macaroon = self._generate_base_macaroon(user_id)
macaroon.add_first_party_caveat("type = access")
@ -1020,16 +1042,9 @@ class MacaroonGenerator(object):
macaroon.add_first_party_caveat(caveat)
return macaroon.serialize()
def generate_short_term_login_token(self, user_id, duration_in_ms=(2 * 60 * 1000)):
"""
Args:
user_id (unicode):
duration_in_ms (int):
Returns:
unicode
"""
def generate_short_term_login_token(
self, user_id: str, duration_in_ms: int = (2 * 60 * 1000)
) -> str:
macaroon = self._generate_base_macaroon(user_id)
macaroon.add_first_party_caveat("type = login")
now = self.hs.get_clock().time_msec()
@ -1037,12 +1052,12 @@ class MacaroonGenerator(object):
macaroon.add_first_party_caveat("time < %d" % (expiry,))
return macaroon.serialize()
def generate_delete_pusher_token(self, user_id):
def generate_delete_pusher_token(self, user_id: str) -> str:
macaroon = self._generate_base_macaroon(user_id)
macaroon.add_first_party_caveat("type = delete_pusher")
return macaroon.serialize()
def _generate_base_macaroon(self, user_id):
def _generate_base_macaroon(self, user_id: str) -> pymacaroons.Macaroon:
macaroon = pymacaroons.Macaroon(
location=self.hs.config.server_name,
identifier="key",

1
tox.ini
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@ -185,6 +185,7 @@ commands = mypy \
synapse/federation/federation_client.py \
synapse/federation/sender \
synapse/federation/transport \
synapse/handlers/auth.py \
synapse/handlers/directory.py \
synapse/handlers/presence.py \
synapse/handlers/sync.py \